Re: [PATCHv3 0/8] Fix the problem that rxe can not work in net namespace

[Zhu Yanjun <yanjun.zhu@linux.dev>]

在 2023/4/20 2:01, Mark Lehrer 写道:
>> TCP without net ns notifier missed the net ns delete scenario results in a use after free bug, that should be fixed first as its critical.
>>
>> Sure. I also confronted this mentioned problem. If I remember correctly,
>> a net ns callback can fix this problem.
> I'm not sure if the bug fix will be this in depth, but I have a
> related question.  What is the proper way for the kernel nvme
> initiator code to know which netns context to use?  e.g. should we
> take the pid of the process that opened /dev/nvme-fabrics and look it
> up (presumaly this will be nvme-cli), and will this method give us
> enough details for both tcp & rdma?

Please check the netns callback functions. You will find all the answers 
to your questions.

Zhu Yanjun

>
> Mark
>
>
> On Tue, Apr 18, 2023 at 10:19 PM Zhu Yanjun <yanjun.zhu@linux.dev> wrote:
>>
>> 在 2023/4/19 8:43, Parav Pandit 写道:
>>>> From: Mark Lehrer <lehrer@gmail.com>
>>>> Sent: Friday, April 14, 2023 12:24 PM
>>>> I'm going to try making the nvme-fabrics set of modules use the network
>>>> namespace properly with RoCEv2.  TCP seems to work properly already, so this
>>>> should be more of a "port" than real development.
>>> TCP without net ns notifier missed the net ns delete scenario results in a use after free bug, that should be fixed first as its critical.
>> Sure. I also confronted this mentioned problem. If I remember correctly,
>> a net ns callback can fix this problem.
>>
>> Zhu Yanjun
>>
>>>> Are you (or anyone else) interested in working on this too?  I'm more familiar
>>>> with the video frame buffer area of the kernel, so first I'm familiarizing myself
>>>> with how nvme-fabrics works with TCP & netns.
>>>>
>>>> Thanks,
>>>> Mark